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Antioxidant

Antioxidant

Antioxidants are chemical compounds that inhibit the oxidation process, protecting materials from degradation caused by oxidative reactions. In lubricant formulations, antioxidants play a crucial role in extending the service life of the lubricant by preventing the degradation of the base oil and other additives under high-temperature and high-pressure conditions.

  • Function: Antioxidants help lubricants resist oxidation, which is the process of oil degrading due to exposure to heat and oxygen. During oxidation, the oil thickens, loses its lubricating properties, and can form harmful sludge and varnish deposits.
  • Mechanism: Antioxidants act as scavengers, neutralizing free radicals – unstable molecules that contribute to oil breakdown. This helps to slow down the oxidation process and maintain the oil’s viscosity and performance for a longer period.
2.6-di-Tertiary Butyl Para-Cresol

2.6-di-Tertiary Butyl Para-Cresol

2.6-di-Tertiary Butyl Para-Cresol is used for blending industrial gear oils, antiwear hydraulic oils, turbine oils, transformer oils, machine tool oils and fuel oils

Ester Phenolic Antioxidant

Ester Phenolic Antioxidant

 it can be widely used in various industrial lubricants

Amine Type Antioxidant

Amine Type Antioxidant Butyl Octyl Diphenylamine

(2 customer reviews)

Amine Type Antioxidant is an excellent high-temperature antioxidant can be widely used in various industrial lubricants.

Nonyl Diphenylamine

Nonyl Diphenylamine

 Nonyl Diphenylamine can be widely used in a variety of high-grade internal combustion engine lubricants

T551 Benzotriazole Derivative

Benzotriazole Derivative

(1 customer review)

The product is used primarily for turbine oils, oil film bearing oils, industrial gear oils, transformer oils and circulation oils.

Types of Antioxidants:

  1. Primary Antioxidants: These antioxidants act by scavenging free radicals and terminating the oxidative chain reactions, thereby preventing the initiation of oxidation. Common primary antioxidants include hindered phenols, amines, and phosphites.
  2. Secondary Antioxidants: Secondary antioxidants function by decomposing hydroperoxides formed during the oxidation process, converting them into stable, non-reactive compounds. Some examples of secondary antioxidants include thioethers, phosphites, and dithiocarbamates.

Key Functions of Antioxidants in Lubricants:

  1. Oxidation Inhibition: Antioxidants protect the lubricant from oxidative degradation, maintaining its viscosity, thermal stability, and overall performance over extended periods.
  2. Extended Service Life: By delaying the onset of oxidation, antioxidants help extend the oil drain intervals, reducing maintenance costs and downtime.
  3. Enhanced Equipment Protection: Antioxidants protect critical engine components and machinery from wear, corrosion, and deposit formation, ensuring smooth and efficient operation.

Commonly Used Antioxidants in Lubricants:

  1. Hindered Phenols: These are primary antioxidants widely used in lubricants due to their excellent oxidative stability and compatibility with various base oils and additives.
  2. Amines: Secondary amines, such as diaryl-p-phenylenediamines (DAPD) and phenyl-alpha-naphthylamine (PAN), are commonly used as antioxidants in lubricants, especially in combination with hindered phenols for synergistic effects.
  3. Phosphites and Phosphonites: These are secondary antioxidants that function by decomposing hydroperoxides and metal ions formed during oxidation, providing enhanced oxidative stability.

Antioxidant Additives Application:

Automotive Engine Oils

Diesel Engine Oils

Industrial Oils (Hydraulic Fluids, Gear Oils, Compressor Oils)

Turbine and Transformer Oils

Polymer and Plastic Additives

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